Chapter 7

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Across
  1. 2. compound made up solely of carbon and hydrogen
  2. 6. Energy stored in the bonds of chemical compounds
  3. 7. equire an input of energy in the form of heat, light, or electricity
  4. 8. a multiplier or factor that measures some property
  5. 10. species formed from chemical reactions process that involves rearrangement of the molecular or ionic structure of a substance
  6. 13. chemical reaction that absorbs heat from its environment
  7. 14. reaction in which one element is substituted for another element in a compound
  8. 15. a list of reactants on the left and arrow symbol a list of products on the right
Down
  1. 1. the positive and negative ions of two ionic compounds exchange places to form two new compounds
  2. 3. reactions that occur when two different atoms or molecules interact to form a different molecule or compound
  3. 4. any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron
  4. 5. something undergoes change during a reaction
  5. 9. chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products.
  6. 11. a standard scientific unit for measuring large quantities of very small entities such as atom
  7. 12. ratio between the mass and the amount of substance (measured in moles)